Index: tools/bugpoint/ExecutionDriver.cpp
===================================================================
--- tools/bugpoint/ExecutionDriver.cpp
+++ tools/bugpoint/ExecutionDriver.cpp
@@ -124,7 +124,7 @@
                cl::ZeroOrMore, cl::PositionalEatsArgs);
 
   cl::opt<std::string>
-  GCCBinary("gcc", cl::init("gcc"),
+  GCCBinary("gcc", cl::init(""),
               cl::desc("The gcc binary to use. (default 'gcc')"));
 
   cl::list<std::string>
@@ -148,6 +148,10 @@
   SafeInterpreter = nullptr;
   std::string Message;
 
+  // Try to fall-back to clang if the user didn't pass GCC as option.
+  if (GCCBinary == "")
+    GCCBinary = "clang";
+
   switch (InterpreterSel) {
   case AutoPick:
     if (!Interpreter) {